Delamination of Composite Material Using Virtual Crack Closure Technique And Cohesive Zone Method for Automotive Structure and Semi-Structure
No Thumbnail Available
Date
2017-11
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
This paper studied Mode Ι delamination of Composite material using Virtual Crack Closure
Technique and Cohesive Zone methods for Automobile Application. Quasi-Isotropic glass
fiber/epoxy composite material is developed using Autodesk composite simulation design
software. Mode Ι isotropic delamination propagation of quasi-isotropic composite material
modeled on ABAQUS
@
10.14 for both Virtual Crack Closure Technique and Cohesive Zone
methods. Virtual Crack Closure Technique with different mesh density as well different viscosity
to overcome convergence difficulty are investigated. In Cohesive Zone method interface is
assumed as damageable homogenous zero thickness layer of cohesive element between two
composite layers. Load-Displacement curve is investigated by varying interfacial strength, penalty
stiffness and viscosity to improve convergence by lowering either both or one, but excessively
lowering is done taking care of over-softening. Design of quasi-isotropic composite with stacking
sequence of [(-45
0
0
0
,45
0
,902
, 02
)2 ]s has Elastic modulus of 30900MPa, Shear modulus of
10300MPa and Poisson’s ratio of 0.293, using this material property critical delamination load
and displacement are obtained from the analytical method , Virtual Crack Closure Technique and
Cohesive Zone methods simulation are 32N,5.9mm and 32.35 N,4.9mm and 30.82N, 5.58mm
respectively.
Description
Keywords
Delamination, Quasi-isotropic, Virtual Crack Closure Techniques, Cohesive Zone methods